Om rubed his head. This wasn't god-like thinking. It seemed simpler when you were up here. It was all a game. You forgot that it wasn't a game down there. People died. Bits got chopped off. We're like eagles up here, he thought. Sometimes we show tortoise how to fly. Then we let go.

For the first time in her life Granny wondered whether there might be something important in all these books people were setting store by these days, although she was opposed to books on strict moral grounds, since she had heard that many of them were written by dead people and therefore it stood to reason reading them would be as bad as necromancy. Among the many things in the infinitely varied universe with which Granny did not hold was talking to dead people, who by all accounts had enough troubles of their own.

If you get the characters right you've done sometimes nearly half the work. I sometimes find I get the characters right then the characters will often help me write the book - not what they look like that's not very important - what people look like is not about their character. You have to describe the shape they leave in the world, how they react to things, what effect they have on people and you do that by telling their story.

The truth is that even big collections of ordinary books distort space, as can readily be proved by anyone who has been around a really old-fashioned secondhand bookshop, one that looks as though they were designed by M. Escher on a bad day and has more stairways than storeys and those rows of shelves which end in little doors that are surely too small for a full-sized human to enter. The relevant equation is: Knowledge = power = energy = matter = mass; a good bookshop is just a genteel Black Hole that knows how to read.

Colon has always thought that heroes had some special kind of clockwork that made them go out and die famously for god, country and apple pie, or whatever particular delicacy their mother made. It had never occurred to him that they might do it because they'd get yelled at if they didn't.

I thought it very strange, and very sad, that the fairy kingdom largely appears to be English. I thought it was time for some regional representation. And the Nac Mac Feegle are, well, they're like tiny little Scottish Smurfs who have seen Braveheart altogether too many times.

The point is that if a book that had been published three years ago started to sell twice as many all of a sudden it probably wouldn't even get no­ticed. People wouldn't be tracking it. The system has cleaned up its act an awful lot but the best-seller list system is not an entirely foolproof thing.